Electromagnet device in lock

Abstract

The utility model discloses an in-lock electromagnet device, which relates to the technical field of electromagnetic locks and comprises a movable iron core and an extension rod slidably arranged in the movable iron core, the extension rod is fixedly connected with a push rod, and a clamping step is formed at the joint of the extension rod and the push rod; the upper portion and the lower portion of the extension rod are sleeved with a first spring and a second spring respectively, the rigidity of the first spring is smaller than that of the second spring, and the two springs form a progressive buffering structure with the clamping step as the reference. Accurate and efficient graded buffering is achieved, multi-element complex working conditions are effectively adapted, the damage risk of impact to the internal structure of the electromagnetic faucet lock is greatly reduced, and it is guaranteed that equipment stably operates and is long-acting and reliable in various environments.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic lock technology, specifically to an electromagnet device inside a lock. Background Technology

[0002] The existing electromagnetic faucet lock structure, as shown in the published patent for a bidirectional holding electromagnet with memory and buffer functions (publication number CN218826455U), has the following main defects in its technical solution:

[0003] The aforementioned patent uses a single spring as a buffer element, which is insufficient when facing complex impact conditions. The single spring has a fixed stiffness, and its buffering effect is poor when the impact force is small, with some impact energy being directly transferred to internal parts, causing wear; when the impact force is large, it is prone to excessive compression and deformation, losing its buffering function and affecting the life and performance stability of the electromagnet. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an internal electromagnet device for locks, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an internal electromagnet device for a lock, comprising a movable iron core and an extension rod slidably disposed therein, wherein the extension rod is fixedly connected to a push rod and the connection point forms a locking step; a first spring and a second spring are respectively sleeved on the upper and lower parts of the extension rod, wherein the stiffness of the first spring is less than that of the second spring, and the two springs form a progressive buffer structure based on the locking step.

[0006] Furthermore, the movable iron core is provided with a middle layer washer and a lower layer washer in sequence from top to bottom. The middle layer washer is movably fitted in the middle of the movable iron core. The lower layer washer is provided with a shaft clip at its lower part and on the upper surface of the lower layer washer. The two ends of the first spring abut against the clip step and the middle layer washer respectively, and the two ends of the second spring abut against the middle layer washer and the lower layer washer respectively.

[0007] Furthermore, a threaded hole is provided at the bottom end of the extension rod, and a screw is connected to the threaded hole. The screw abuts against the lower washer to adjust the preload of the two springs.

[0008] Furthermore, the electromagnetic faucet lock structure also includes an outer frame, an inner skeleton fixedly installed inside the outer frame, and the movable iron core slidably connected inside the inner skeleton.

[0009] Furthermore, an upper iron core is fixedly installed on the inner side of the top of the inner frame, and a lower iron core is fixedly installed on the inner side of the bottom. The top of the push rod passes through the upper iron core and extends to the outside of the outer frame.

[0010] Furthermore, the upper part of the inner skeleton is wound with an upper coil winding, the lower part is wound with a lower coil winding, and permanent magnets are symmetrically arranged in the middle. Semi-circular grooves are opened on the adjacent sides of the permanent magnets to avoid the circular cylinder in the middle of the inner skeleton.

[0011] Furthermore, a lead wire is provided at the top of the inner frame, and the lead wire is connected to one of the leads of the upper coil winding and the lower coil winding, respectively, and the other leads of the two coil windings are connected in series.

[0012] This invention provides an electromagnet device inside a lock. Compared with the prior art, it has the following advantages:

[0013] This electromagnetic faucet lock structure employs a dual-spring combination design with different stiffnesses. It can dynamically and adaptively adjust the buffering strategy according to the actual impact force, achieving precise and efficient graded buffering: Under small impact conditions, the spring with lower stiffness responds quickly with its softer characteristics and flexibly dissipates the impact energy, preventing small energy fluctuations from interfering with internal precision parts; when a large impact occurs, the spring with higher stiffness takes over and starts, using its harder characteristics to strongly bear the remaining impact, forming a double-layer buffer defense line. This effectively adapts to diverse and complex working conditions, significantly reducing the risk of impact damage to the internal structure of the electromagnetic faucet lock, and ensuring stable operation and long-term reliability of the equipment in various environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the disassembled structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the extension rod and push rod in this utility model;

[0016] Figure 3 This is a schematic diagram of the assembly structure of this utility model;

[0017] Figure 4 This is a half-sectional view of the assembled version of this utility model.

[0018] Figure 5 This is a schematic diagram of the limiting groove of this utility model.

[0019] Figure 6 This is a schematic diagram of the push rod of this utility model.

[0020] In the diagram: 1. Outer frame; 2. Inner frame; 21. Lead wire; 3. Movable iron core; 4. Extension rod; 41. Threaded hole; 5. Push rod; 6. Locking step; 7. Middle layer washer; 71. Limiting groove; 8. Lower layer washer; 9. First spring; 10. Second spring; 11. Upper layer iron core; 12. Lower layer iron core; 13. Screw; 14. Shaft clip; 15. Upper layer coil winding; 16. Lower layer coil winding; 17. Permanent magnet. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: an internal electromagnet device for a lock, mainly composed of core components such as an outer frame 1, an inner skeleton 2, a movable iron core 3, an extension rod 4, and a push rod 5, as well as supporting components such as springs, washers, iron cores, coil windings, and permanent magnets. Specifically:

[0023] The movable iron core 3 is slidably installed inside the inner frame 2 to ensure that the movable iron core 3 can slide smoothly along the inner wall of the inner frame 2;

[0024] The extension rod 4 and push rod 5 are slidably installed into the interior of the movable iron core 3, and then fixedly connected by welding or other fixing methods. A locking step 6 is provided at the connection point. The function of the locking step 6 will be reflected in the subsequent spring installation and operation process, as it provides support and positioning reference for the spring.

[0025] A middle layer washer 7 is movably installed in the middle of the movable iron core 3. The middle layer washer 7 can move within a certain range on the movable iron core 3, but it is constrained by the inner wall of the movable iron core 3 and will not detach from the movable iron core 3.

[0026] An L-shaped step is provided at the bottom of the inner hole of the movable iron core 3. The L-shaped step allows the shaft clip 14 to be positioned. The shaft clip 14 fits against the upper surface of the L-shaped step, and then a lower washer 8 is provided on the upper surface of the shaft clip 14. In this way, the shaft clip 14 can better enable the lower washer 8 to play a supporting role.

[0027] The first spring 9 is sleeved on the upper part of the extension rod 4, and the two ends of the first spring 9 abut against the locking step 6 and the middle layer washer 7, respectively. The first spring 9 is a spring with low stiffness, that is, a soft spring, which can easily undergo elastic deformation when subjected to external force, and play a preliminary buffering role.

[0028] The second spring 10 is fitted onto the lower part of the extension rod 4, with its two ends abutting against the middle washer 7 and the lower washer 8, respectively. The second spring 10 is a spring with high stiffness, i.e., a relatively stiff spring. After the first spring 9 completes the initial buffering, the second spring 10 continues to play a buffering role, forming a progressive buffering structure to further absorb and disperse impact energy, thereby improving the stability and service life of the electromagnetic faucet lock.

[0029] The upper iron core 11 is fixedly connected to the inner top of the inner frame 2 by welding, screws, or other means. The lower iron core 12 is also fixedly connected to the inner bottom of the inner frame 2. The top of the push rod 5 penetrates the interior of the upper iron core 11 and extends to the exterior of the outer frame 1. At the position where the push rod 5 penetrates the upper iron core 11, the fit clearance between the two should be appropriate to ensure that the push rod 5 slides smoothly while avoiding wobbling due to excessive clearance, which would affect the locking accuracy.

[0030] A threaded hole 41 is pre-drilled at the bottom of the extension rod 4. The screw 13 is threaded into the threaded hole 41 and the screwing depth of the screw 13 is adjusted so that the screw 13 abuts against the lower washer 8. By adjusting the screw 13, the preload of the spring can be finely adjusted to meet the usage requirements under different working conditions.

[0031] At the upper part of the inner frame 2, an upper coil winding 15 is set using a winding process to ensure that the coil winding is tightly and evenly wound on the inner frame 2, avoiding loosening or uneven winding spacing, which would affect electromagnetic performance. At the lower part of the inner frame 2, a lower coil winding 16 is also set using a winding method. At symmetrical positions in the middle of the inner frame 2, permanent magnets 17 are connected by means of bonding, screws, etc. Semi-circular slots are opened on adjacent sides of the permanent magnets 17. This design cleverly avoids the central circular cylinder of the inner frame 2, allowing the permanent magnets 17 to be smoothly assembled onto the inner frame 2 and ensuring a tight fit between the permanent magnets 17 and the inner frame 2, thus improving the stability of the magnetic circuit.

[0032] A lead wire 21 is installed at the top of the inner frame 2. The lead wire 21 is connected to one of the leads of the upper coil winding 15 and the lower coil winding 16, respectively. The other leads of the upper coil winding 15 and the lower coil winding 16 are connected in series. The lead wire 21 is connected to an external power supply and control circuit to realize the energization control of the upper coil winding 15 and the lower coil winding 16, thereby controlling the action of the electromagnetic auger lock.

[0033] The inner frame 2 is securely installed inside the outer frame 1 by welding, screw connection or other fixing methods.

[0034] Please read Figure 5 As shown, a limiting groove 71 is provided in the middle of the extension rod of this patent. The middle layer washer 7 is fixed by the limiting groove, so that the upper spring and the lower spring can achieve elastic force in different directions, and achieve better pushing and pulling effects.

[0035] Working principle:

[0036] When the external control circuit energizes the upper coil winding 15 and the lower coil winding 16 through lead 21, the upper iron core 11 and the lower iron core 12 will generate a magnetic field according to the principle of electromagnetic induction. Under the action of the magnetic field, the movable iron core 3 is attracted by the electromagnetic force and begins to slide along the inner wall of the inner frame 2. The movable iron core 3 drives the extension rod 4 and the push rod 5 to move together. The top of the push rod 5 extends or retracts from the outside of the outer frame 1, realizing the locking or unlocking action of the electromagnetic auger lock.

[0037] After power failure, the magnetic field generated by the permanent magnet 17 exerts a holding force on the movable iron core 3, keeping it in its current position and achieving a bidirectional holding function. That is, regardless of whether the electromagnetic faucet lock is in the locked or unlocked state, it can stably maintain its position after power failure and will not change position due to slight external vibrations, thus improving the reliability and security of the electromagnetic faucet lock.

[0038] During the sliding process of the movable iron core 3, when it is impacted by an external force or reaches the end of its stroke, the progressive buffer structure begins to function. First, the first spring 9 is compressed or stretched. Due to its low stiffness, it can quickly undergo elastic deformation, absorbing some of the impact energy and providing initial buffering. As the impact energy is further transmitted, the second spring 10 begins to function. Due to its high stiffness, it can withstand greater impact forces, further absorbing and dispersing the remaining impact energy, thereby protecting the various components inside the electromagnetic auger lock, preventing damage due to excessive impact, and extending the service life of the electromagnetic auger lock.

Claims

1. A lock internal electromagnet device, characterized in that, It includes a movable iron core (3) and an extension rod (4) slidably disposed therein. The extension rod (4) is fixedly connected to the push rod (5) and a locking step (6) is formed at the connection. The upper and lower parts of the extension rod (4) are respectively fitted with a first spring (9) and a second spring (10). The stiffness of the first spring (9) is less than that of the second spring (10). The two springs form a progressive buffer structure with the locking step (6) as the reference.

2. The lock internal electromagnet device according to claim 1, characterized in that, The movable iron core (3) is provided with a middle layer washer (7) and a lower layer washer (8) from top to bottom. The middle layer washer (7) is movably fitted in the middle of the movable iron core (3). The lower layer washer (8) is provided with a shaft clip (14) on its lower part and on its upper surface. The two ends of the first spring (9) abut against the locking step (6) and the middle layer washer (7) respectively. The two ends of the second spring (10) abut against the middle layer washer (7) and the lower layer washer (8) respectively.

3. The lock internal electromagnet device according to claim 1, characterized in that, The extension rod (4) has a threaded hole (41) at its bottom end. A screw (13) is connected to the threaded hole (41) with an internal thread. The screw (13) abuts against the lower washer (8) to adjust the preload of the two springs.

4. The lock internal electromagnet device according to claim 1, characterized in that, It also includes an outer frame (1), an inner skeleton (2) fixedly installed inside the outer frame (1), and the movable iron core (3) slidably connected inside the inner skeleton (2).

5. The lock internal electromagnet device according to claim 4, characterized in that, The inner frame (2) has an upper iron core (11) fixedly installed on the inner side of the top and a lower iron core (12) fixedly installed on the inner side of the bottom. The top of the push rod (5) passes through the upper iron core (11) and extends to the outside of the outer frame (1).

6. The lock internal electromagnet device according to claim 4, characterized in that, The inner skeleton (2) is wound with an upper coil winding (15) on the upper part and a lower coil winding (16) on the lower part. Permanent magnets (17) are symmetrically arranged in the middle. Semi-circular grooves are opened on the adjacent sides of the permanent magnets (17) to avoid the circular cylinder in the middle of the inner skeleton (2).

7. The lock internal electromagnet device according to claim 6, characterized in that, The inner frame (2) is provided with a lead wire (21) at the top. The lead wire (21) is connected to one of the leads of the upper coil winding (15) and the lower coil winding (16), respectively, and the other leads of the two coil windings are connected in series.

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